5mm solid nodule in throat

I am a 41 year old female. I thought it was my thyroid, the doctor palpated and was able to feel that it seemed enlarged. Had all the thyroid testing done, everything came back normal. Had an ultrasound they found a 5mm solid nodule and said get another ultrasound in 6 months. I can’t go another 6 months feeling this way. I feel like there is constantly something in my throat and I have to clear my throat multiple times in 5 minutes, it is worse at night. I get out of breath going up a flight of stairs. Feet, legs and hands are swollen every morning. Hands are numb and tingly also when I wake up. I could sleep for a solid 12 hours and still feel exhausted when I wake up. My legs are so heavy when I walk. I have gained 30 pounds in about 3 months with no change in my diet and I am still gaining and I eat less. Have crazy cravings for sweets, I rarely like sweets, but the cravings are so powerful. Hair is falling out and dry. I have always had a problem with oily hair. My tongue is very sore, anything salty burns my tongue, and it feels like my tongue is swollen, and I have been biting it a lot when I talk. I have always had an excellent memory and now I am very forgetful and I have this brain fog. I can see a visible swelling in my neck, but the ultrasound said it was normal in size, it measured 5.0 x 1.6 x 1.9 cm on the right lobe and 5.4 x 1.0 x 1.4cm on the left lobe. Anyone have any idea what is wrong with me!